.app{
	width: 100%;
	height: 100vh;
	background-color: #222;
	position: relative;
	display: flex;
	justify-content: center;
	align-items: center;
}
.hole99{
  display: flex;
  align-items: center;
  justify-content: center;
}
.span99{
  width: 50px;
  height: 50px;
  border-radius: 50%;
  opacity: 0;
	display: block;
	position: absolute;
  animation: hole-eff99 3s linear infinite;
}
.span99:nth-child(1){
  animation-delay: 0.3s;
}
.span99:nth-child(2){
  animation-delay: 0.6s;
}
.span99:nth-child(3){
  animation-delay: 0.9s;
}
.span99:nth-child(4){
  animation-delay: 1.2s;
}
.span99:nth-child(5){
  animation-delay: 1.5s;
}
.span99:nth-child(6){
  animation-delay: 1.8s;
}
.span99:nth-child(7){
  animation-delay: 2.1s;
}
.span99:nth-child(8){
  animation-delay: 2.4s;
}
.span99:nth-child(9){
  animation-delay: 2.7s;
}
.span99:nth-child(10){
  animation-delay: 3s;
}
@keyframes hole-eff99 {
  0% {
    transform: scale(2);
    opacity: 0;
    box-shadow: 0px 0px 50px rgba(255, 255, 255, 0.5);
  }
  50% {
    transform: scale(1) translate(0px, -5px);
    opacity: 1;
    box-shadow: 0px 8px 20px rgba(255, 255, 255, 0.5);
  }
  100% {
    transform: scale(0.1) translate(0px, 5px);
    opacity: 0;
    box-shadow: 0px 10px 20px rgba(255, 255, 255, 0);
  }
}
